Class InteriorPoint

1	/*
2	* Copyright (c) 2016 Martin Davis.
3	*
4	* All rights reserved. This program and the accompanying materials
5	* are made available under the terms of the Eclipse Public License 2.0
6	* and Eclipse Distribution License v. 1.0 which accompanies this distribution.
7	* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v20.html
8	* and the Eclipse Distribution License is available at
9	*
10	* http://www.eclipse.org/org/documents/edl-v10.php.
11	*/
12	package org.locationtech.jts.algorithm;
13
14	import org.locationtech.jts.geom.Coordinate;
15	import org.locationtech.jts.geom.Geometry;
16	import org.locationtech.jts.geom.GeometryFactory;
17	import org.locationtech.jts.geom.Point;
18
19	/**
20	* Computes an interior point of a <code>{@link Geometry}</code>.
21	* An interior point is guaranteed to lie in the interior of the Geometry,
22	* if it possible to calculate such a point exactly.
23	* Otherwise, the point may lie on the boundary of the geometry.
24	* <p>
25	* The interior point of an empty geometry is <code>null</code>.
26	*/
27	public class InteriorPoint {
28
29	/**
30	* Compute a location of an interior point in a {@link Geometry}.
31	* Handles all geometry types.
32	*
33	* @param geom a geometry in which to find an interior point
34	* @return the location of an interior point,
35	* or <code>null</code> if the input is empty
36	*/
37	public static Coordinate getInteriorPoint(Geometry geom) {
38	if (geom.isEmpty())
39	return null;
40
41	Coordinate interiorPt = null;
42	int dim = geom.getDimension();
43	if (dim == 0) {
44	interiorPt = InteriorPointPoint.getInteriorPoint(geom);
45	}
46	else if (dim == 1) {
47	interiorPt = InteriorPointLine.getInteriorPoint(geom);
48	}
49	else {
50	interiorPt = InteriorPointArea.getInteriorPoint(geom);
51	}
52	return interiorPt;
53	}
54
55	}
56